Bookmarklet to help create Kobo sale posts

salty-horse · 03-28-2025, 08:07 AM

I created a bookmarklet to help me make sale posts faster.
When activated on a Kobo page, it pops up a textbox with formatted text that I can paste into these forums.

This is based on my opinion on how to create an informative post. It has the book title in bold, the author name, a rounded price (no ".99" cents), the description, and series information, if available. It detects the US and UK stores. I also kept a placeholder for Amazon links.

Feel free to tweak it as you wish, or I can customize it for you.

To create this bookmarklet, copy this text and paste it as the URL of a new bookmark. Place it in a bookmark toolbar, and click it when you're on a Kobo page for an unpurchased book (otherwise, the price isn't visible.) You can open a private tab if you want to see the price.

PHP Code:


			
javascript:(function()%7Bfunction%20htmlToText(html)%7B%20html%20%3D%20html.replace(%2F%5Cn%2Fg%2C%20'')%3B%20html%20%3D%20html.replace(%2F%5Ct%2Fg%2C%20'')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Ftd%3E%2Fg%2C%20'%5Ct')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Ftable%3E%2Fg%2C%20'%5Cn')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Ftr%3E%2Fg%2C%20'%5Cn')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Fp%3E%2Fg%2C%20'%5Cn%5Cn')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Fdiv%3E%2Fg%2C%20'%5Cn')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Fh%3E%2Fg%2C%20'%5Cn')%3B%20html%20%3D%20html.replace(%2F%3Cstrong%3E%2Fg%2C%20'%5BB%5D')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Fstrong%3E%2Fg%2C%20'%5B%5C%2FB%5D')%3B%20html%20%3D%20html.replace(%2F%3Cem%3E%2Fg%2C%20'%5BI%5D')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Fem%3E%2Fg%2C%20'%5B%5C%2FI%5D')%3B%20html%20%3D%20html.replace(%2F%3Cul%3E%2Fg%2C%20'%5BLIST%5D')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Ful%3E%2Fg%2C%20'%5B%5C%2FLIST%5D')%3B%20html%20%3D%20html.replace(%2F%3Cli%3E%2Fg%2C%20'%5B*%5D')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Fli%3E%2Fg%2C%20'')%3B%20html%20%3D%20html.replace(%2F%3Cbr%3E%2Fg%2C%20'%5Cn')%3B%20html%20%3D%20html.replace(%2F%3Cbr(%20)*%5C%2F%3E%2Fg%2C%20'%5Cn')%3B%20let%20dom%20%3D%20(new%20DOMParser()).parseFromString('%3C!doctype%20html%3E%3Cbody%3E'%20%2B%20html%2C%20'text%2Fhtml')%3B%20return%20dom.body.textContent.trim()%3B%20%7D%20currencies%20%3D%20%7B'USD'%3A%20%5B'%24'%2C%20'US'%5D%2C%20'GBP'%3A%20%5B'%C2%A3'%2C%20'UK'%5D%7D%3B%20function%20createPostText()%20%7B%20let%20title%20%3D%20document.querySelector('h1.title').innerHTML.trim().replace(%2F%26amp%3B%2Fg%2C%20'%26')%3B%20let%20author%20%3D%20document.querySelector('a.contributor-name').innerHTML.trim()%3B%20let%20description%20%3D%20%20htmlToText(document.querySelector('div%5Bdata-full-synopsis%5D').innerHTML.trim())%3B%20let%20price%20%3D%20Math.round(parseFloat(document.querySelector('meta%5Bproperty%3D%22og%3Aprice%22%5D').content))%3B%20let%20%5Bcurrency%2C%20country%5D%20%3D%20currencies%5Bdocument.querySelector('meta%5Bproperty%3D%22og%3Acurrency_code%22%5D').content%5D%3B%20let%20seriesField%20%3D%20document.querySelector('span.product-sequence-field')%3B%20let%20series%20%3D%20''%3B%20if%20(seriesField)%20%7B%20seriesName%20%3D%20seriesField.innerText%3B%20seriesNumber%20%3D%20document.querySelector('span.sequenced-name-prefix')%3B%20if%20(seriesNumber)%20%7B%20let%20match%20%3D%20seriesNumber.innerText.match(%2F%5Cd%2B%2F)%3B%20if%20(match)%20%7B%20series%20%3D%20%60%20(%5BI%5D%24%7BseriesName%7D%20%23%24%7Bmatch%5B0%5D%7D%5B%2FI%5D)%60%3B%20%7D%20%7D%20if%20(!series)%20%7B%20series%20%3D%20%60%20(%5BI%5D%24%7BseriesName%7D%5B%2FI%5D)%60%3B%20%7D%20%7D%20let%20isbn%20%3D%20JSON.parse(JSON.parse(document.querySelector('%23ratings-widget-details-wrapper').dataset.koboGizmoConfig).googleBook).workExample.isbn%3B%20let%20amazonTLD%20%3D%20country%20%3D%3D%20'US'%20%3F%20'com'%20%3A%20'co.uk'%3B%20let%20amazonURL%20%3D%20%60https%3A%2F%2Fwww.amazon.%24%7BamazonTLD%7D%2Fs%3Fk%3D%24%7Bisbn%7D%26i%3Ddigital-text%60%3B%20let%20pageUrl%20%3D%20window.location.href.split('%3F')%5B0%5D%3B%20let%20text%20%3D%20%60%5BB%5D%5BI%5D%24%7Btitle%7D%5B%2FB%5D%5B%2FI%5D%24%7Bseries%7D%20by%20%24%7Bauthor%7D%20is%20%24%7Bcurrency%7D%24%7Bprice%7D%20in%20the%20%24%7Bcountry%7D%20(%5BURL%3D%24%7BpageUrl%7D%5DKobo%5B%2FURL%5D%2C%20%5BURL%3D%24%7BamazonURL%7D%5DAmazon%5B%2FURL%5D)%5Cn%5BQUOTE%5D%24%7Bdescription%7D%5B%2FQUOTE%5D%60%3B%20let%20div%20%3D%20document.createElement('div')%3B%20div.style%20%3D%20%22position%3A%20fixed%3B%20top%3A%200em%3B%20right%3A%200em%3B%20width%3A%20500px%3B%20height%3A%20500px%3B%20border%3A%201px%20solid%20black%3B%20z-index%3A%2010000%3B%22%3B%20let%20textarea%20%3D%20document.createElement('textarea')%3B%20textarea.style%20%3D%20%22width%3A%20400px%3B%20height%3A%20400px%3B%22%3B%20textarea.value%20%3D%20text%3B%20div.appendChild(textarea)%3B%20document.body.appendChild(div)%3B%20textarea.focus()%3B%20textarea.setSelectionRange(0%2C%20text.length%2C%20'backward')%3B%20window.addEventListener('click'%2Cfunction(event)%20%7B%20if%20(!(div.contains(event.target)))%20%7B%20div.remove()%3B%20%7D%20%7D)%3B%20%7D%20createPostText()%3B%7D)()%3B

Cactus Chef · 03-28-2025, 09:48 AM

I put your function into a Javascript Beautifier to try to better understand it, and I still have no idea what it's doing.

Nice idea in theory, though. I've thought about doing something similar so that when I see a publisher sale ebook price on Kobo I could have it automatically retrieve the same book on Amazon, Barnes & Noble, Google Play, and Apple Books, for the purpose of more easily populating the deal post.

salty-horse · 03-28-2025, 01:18 PM

Quote:

Originally Posted by Cactus Chef

I put your function into a Javascript Beautifier to try to better understand it, and I still have no idea what it's doing.

Sorry, it needs to be "unquoted" beforehand.

Here's the original script, which I then pasted into a bookmarklet maker

I didn't try fetching other retailers. I can try adding Amazon by searching for the ISBN on the Kobo page.

salty-horse · 03-31-2025, 09:41 AM

I can't fetch data from Amazon, since the script runs on Kobo's "website", and some browser security features block outgoing requests. But I can include a search page result page instead of a direct link, like:

https://www.amazon.com/s?k=9781668060063&i=digital-text

EDIT: Update bookmarklet code above.

salty-horse · 04-01-2025, 01:51 AM

Fixed amazon UK link.

salty-horse · 05-06-2025, 03:37 AM

Fixed trimmed description with "..." at the end (I copied the text from an expandable element instead of its source)

salty-horse · 07-09-2025, 05:39 AM

Added support for bold text in descriptions.

salty-horse · 12-10-2025, 12:53 PM

Fixed "&" in book titles appearing as "&".

Cactus Chef · 09-30-2026, 09:29 AM

Ran into a problem with this book earlier today using your script. It kinda barfed on some of the multi-lines. See below
---

Greatest Hits (Herald Classics) by Harlan Ellison is $3 in the US (Kobo, Amazon)

Quote:

A collection of award-winning short stories, including the viral “I Have No Mouth, and I Must Scream” by Harlan Ellison, an eight-time Hugo Award winner, five-time Bram Stoker Award winner, and four-time Nebula Award winner.

As one of the great writers of speculative fiction of the twentieth century, Harlan Ellison shaped the science fiction, fantasy, and horror genres. This inventive and provocative collection of his best-known and most-acclaimed stories is a perfect treasury for old Ellison fans as well as readers discovering this zany, polyphonic writer for the first time.

Featuring these stories and many more:

“‘Repent, Harlequin,’ Said the Ticktockman” — Hugo Award winner“I Have No Mouth, and I Must Scream” — Bram Stoker Award winner“Mefisto in Onyx” — Bram Stoker Award winner“Jeffty Is Five” — British Fantasy Award winner“Shatterday” — Twilight Zone episode“The Whimper of Whipped Dogs” — Edgar Allan Poe Award winner“Paladin of the Lost Hour” — Hugo Award winner, Twilight Zone episodeA must-read for sci-fi book lovers and fans of Ray Bradbury, Ursula K. Le Guin, and Isaac Asimov, this career-spanning compilation of classic short stories is also perfect for readers who enjoyed Dangerous Visions**,** A Boy and His Dog**, or other Harlan Ellison books.**

salty-horse · 09-30-2026, 11:06 AM

Interesting. It uses a list.
I updated the script in the the top post. If you think the created list is too spacious, I can change it to be regular lines, like Kobo shows it.

Quote:

Featuring these stories and many more:

“‘Repent, Harlequin,’ Said the Ticktockman” — Hugo Award winner
“I Have No Mouth, and I Must Scream” — Bram Stoker Award winner
“Mefisto in Onyx” — Bram Stoker Award winner
“Jeffty Is Five” — British Fantasy Award winner
“Shatterday” — Twilight Zone episode
“The Whimper of Whipped Dogs” — Edgar Allan Poe Award winner
“Paladin of the Lost Hour” — Hugo Award winner, Twilight Zone episode

A must-read ...

Cactus Chef · 09-30-2026, 11:26 AM

I think bullet points are fine, personally. We'll see what our resident curmudgeon thinks of it when I start posting deals with the updated script...

03-28-2025, 08:07 AM	#1
salty-horse Wizard Posts: 2,825 Karma: 25155167 Join Date: Sep 2008 Device: Kobo Clara 2E	Bookmarklet to help create Kobo sale posts I created a bookmarklet to help me make sale posts faster. When activated on a Kobo page, it pops up a textbox with formatted text that I can paste into these forums. This is based on my opinion on how to create an informative post. It has the book title in bold, the author name, a rounded price (no ".99" cents), the description, and series information, if available. It detects the US and UK stores. I also kept a placeholder for Amazon links. Feel free to tweak it as you wish, or I can customize it for you. To create this bookmarklet, copy this text and paste it as the URL of a new bookmark. Place it in a bookmark toolbar, and click it when you're on a Kobo page for an unpurchased book (otherwise, the price isn't visible.) You can open a private tab if you want to see the price. PHP Code: javascript:(function()%7Bfunction%20htmlToText(html)%7B%20html%20%3D%20html.replace(%2F%5Cn%2Fg%2C%20'')%3B%20html%20%3D%20html.replace(%2F%5Ct%2Fg%2C%20'')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Ftd%3E%2Fg%2C%20'%5Ct')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Ftable%3E%2Fg%2C%20'%5Cn')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Ftr%3E%2Fg%2C%20'%5Cn')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Fp%3E%2Fg%2C%20'%5Cn%5Cn')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Fdiv%3E%2Fg%2C%20'%5Cn')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Fh%3E%2Fg%2C%20'%5Cn')%3B%20html%20%3D%20html.replace(%2F%3Cstrong%3E%2Fg%2C%20'%5BB%5D')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Fstrong%3E%2Fg%2C%20'%5B%5C%2FB%5D')%3B%20html%20%3D%20html.replace(%2F%3Cem%3E%2Fg%2C%20'%5BI%5D')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Fem%3E%2Fg%2C%20'%5B%5C%2FI%5D')%3B%20html%20%3D%20html.replace(%2F%3Cul%3E%2Fg%2C%20'%5BLIST%5D')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Ful%3E%2Fg%2C%20'%5B%5C%2FLIST%5D')%3B%20html%20%3D%20html.replace(%2F%3Cli%3E%2Fg%2C%20'%5B%5D')%3B%20html%20%3D%20html.replace(%2F%3C%5C%2Fli%3E%2Fg%2C%20'')%3B%20html%20%3D%20html.replace(%2F%3Cbr%3E%2Fg%2C%20'%5Cn')%3B%20html%20%3D%20html.replace(%2F%3Cbr(%20)%5C%2F%3E%2Fg%2C%20'%5Cn')%3B%20let%20dom%20%3D%20(new%20DOMParser()).parseFromString('%3C!doctype%20html%3E%3Cbody%3E'%20%2B%20html%2C%20'text%2Fhtml')%3B%20return%20dom.body.textContent.trim()%3B%20%7D%20currencies%20%3D%20%7B'USD'%3A%20%5B'%24'%2C%20'US'%5D%2C%20'GBP'%3A%20%5B'%C2%A3'%2C%20'UK'%5D%7D%3B%20function%20createPostText()%20%7B%20let%20title%20%3D%20document.querySelector('h1.title').innerHTML.trim().replace(%2F%26amp%3B%2Fg%2C%20'%26')%3B%20let%20author%20%3D%20document.querySelector('a.contributor-name').innerHTML.trim()%3B%20let%20description%20%3D%20%20htmlToText(document.querySelector('div%5Bdata-full-synopsis%5D').innerHTML.trim())%3B%20let%20price%20%3D%20Math.round(parseFloat(document.querySelector('meta%5Bproperty%3D%22og%3Aprice%22%5D').content))%3B%20let%20%5Bcurrency%2C%20country%5D%20%3D%20currencies%5Bdocument.querySelector('meta%5Bproperty%3D%22og%3Acurrency_code%22%5D').content%5D%3B%20let%20seriesField%20%3D%20document.querySelector('span.product-sequence-field')%3B%20let%20series%20%3D%20''%3B%20if%20(seriesField)%20%7B%20seriesName%20%3D%20seriesField.innerText%3B%20seriesNumber%20%3D%20document.querySelector('span.sequenced-name-prefix')%3B%20if%20(seriesNumber)%20%7B%20let%20match%20%3D%20seriesNumber.innerText.match(%2F%5Cd%2B%2F)%3B%20if%20(match)%20%7B%20series%20%3D%20%60%20(%5BI%5D%24%7BseriesName%7D%20%23%24%7Bmatch%5B0%5D%7D%5B%2FI%5D)%60%3B%20%7D%20%7D%20if%20(!series)%20%7B%20series%20%3D%20%60%20(%5BI%5D%24%7BseriesName%7D%5B%2FI%5D)%60%3B%20%7D%20%7D%20let%20isbn%20%3D%20JSON.parse(JSON.parse(document.querySelector('%23ratings-widget-details-wrapper').dataset.koboGizmoConfig).googleBook).workExample.isbn%3B%20let%20amazonTLD%20%3D%20country%20%3D%3D%20'US'%20%3F%20'com'%20%3A%20'co.uk'%3B%20let%20amazonURL%20%3D%20%60https%3A%2F%2Fwww.amazon.%24%7BamazonTLD%7D%2Fs%3Fk%3D%24%7Bisbn%7D%26i%3Ddigital-text%60%3B%20let%20pageUrl%20%3D%20window.location.href.split('%3F')%5B0%5D%3B%20let%20text%20%3D%20%60%5BB%5D%5BI%5D%24%7Btitle%7D%5B%2FB%5D%5B%2FI%5D%24%7Bseries%7D%20by%20%24%7Bauthor%7D%20is%20%24%7Bcurrency%7D%24%7Bprice%7D%20in%20the%20%24%7Bcountry%7D%20(%5BURL%3D%24%7BpageUrl%7D%5DKobo%5B%2FURL%5D%2C%20%5BURL%3D%24%7BamazonURL%7D%5DAmazon%5B%2FURL%5D)%5Cn%5BQUOTE%5D%24%7Bdescription%7D%5B%2FQUOTE%5D%60%3B%20let%20div%20%3D%20document.createElement('div')%3B%20div.style%20%3D%20%22position%3A%20fixed%3B%20top%3A%200em%3B%20right%3A%200em%3B%20width%3A%20500px%3B%20height%3A%20500px%3B%20border%3A%201px%20solid%20black%3B%20z-index%3A%2010000%3B%22%3B%20let%20textarea%20%3D%20document.createElement('textarea')%3B%20textarea.style%20%3D%20%22width%3A%20400px%3B%20height%3A%20400px%3B%22%3B%20textarea.value%20%3D%20text%3B%20div.appendChild(textarea)%3B%20document.body.appendChild(div)%3B%20textarea.focus()%3B%20textarea.setSelectionRange(0%2C%20text.length%2C%20'backward')%3B%20window.addEventListener('click'%2Cfunction(event)%20%7B%20if%20(!(div.contains(event.target)))%20%7B%20div.remove()%3B%20%7D%20%7D)%3B%20%7D%20createPostText()%3B%7D)()%3B Last edited by salty-horse; 09-30-2026 at 11:03 AM. Reason: Fix bug

03-31-2025, 09:41 AM	#4
salty-horse Wizard Posts: 2,825 Karma: 25155167 Join Date: Sep 2008 Device: Kobo Clara 2E	I can't fetch data from Amazon, since the script runs on Kobo's "website", and some browser security features block outgoing requests. But I can include a search page result page instead of a direct link, like: https://www.amazon.com/s?k=9781668060063&i=digital-text EDIT: Update bookmarklet code above. Last edited by salty-horse; 03-31-2025 at 09:52 AM.

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03-28-2025, 09:48 AM	#2
Cactus Chef Guru Posts: 983 Karma: 12345678 Join Date: Apr 2019 Location: East Coast, United States Device: Kobo Sage, Kobo Clara HD, Galaxy Tab S5e, Kindle 4th Gen	I put your function into a Javascript Beautifier to try to better understand it, and I still have no idea what it's doing. Nice idea in theory, though. I've thought about doing something similar so that when I see a publisher sale ebook price on Kobo I could have it automatically retrieve the same book on Amazon, Barnes & Noble, Google Play, and Apple Books, for the purpose of more easily populating the deal post.

04-01-2025, 01:51 AM	#5
salty-horse Wizard Posts: 2,825 Karma: 25155167 Join Date: Sep 2008 Device: Kobo Clara 2E	Fixed amazon UK link.

05-06-2025, 03:37 AM	#6
salty-horse Wizard Posts: 2,825 Karma: 25155167 Join Date: Sep 2008 Device: Kobo Clara 2E	Fixed trimmed description with "..." at the end (I copied the text from an expandable element instead of its source)

07-09-2025, 05:39 AM	#7
salty-horse Wizard Posts: 2,825 Karma: 25155167 Join Date: Sep 2008 Device: Kobo Clara 2E	Added support for bold text in descriptions.

12-10-2025, 12:53 PM	#8
salty-horse Wizard Posts: 2,825 Karma: 25155167 Join Date: Sep 2008 Device: Kobo Clara 2E	Fixed "&" in book titles appearing as "&".

09-30-2026, 11:26 AM	#11
Cactus Chef Guru Posts: 983 Karma: 12345678 Join Date: Apr 2019 Location: East Coast, United States Device: Kobo Sage, Kobo Clara HD, Galaxy Tab S5e, Kindle 4th Gen	I think bullet points are fine, personally. We'll see what our resident curmudgeon thinks of it when I start posting deals with the updated script...